Gran Bretaña. Ministry of Transport. (1920). Railway statistics, Great Britain. His Majesty's Stationery Office.
Cita Chicago Style (17a ed.)Gran Bretaña. Ministry of Transport. Railway Statistics, Great Britain. London: His Majesty's Stationery Office, 1920.
Cita MLA (9a ed.)Gran Bretaña. Ministry of Transport. Railway Statistics, Great Britain. His Majesty's Stationery Office, 1920.
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